goyne



(No Model.) f2 Shets-Sheet'l.

C. A. GOYNE.

VALVE OPERATING DEVICE. l

No. 347,173. I 6.

(No Model.) 2 sheets--sheet 2. ,G A. GOYNB.

VALVE OPERATING DEVICE..

No. 347,173. Patented Aug. 10, 1886.

Fris

EEICE.

CHARLES A. GOYNE, OF ASHLAND, PENNSYLVANIA, ASSIGNOR TO IIIMSELF,

THOMAS E. eoYNE, FRANCIS ,OE SAME PLAGE. n

H.Y coYNE, AND ARTHUR H. eoYNE, ALL

VALVE-OPERATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 347,173, dated August10, 1886.

To azZZ whom it may concern:

Be it known that I, CHARLES A. GOYNE, a citizen of the United States,residing in Ashland, Schuylkill county, Pennsylvania, have inventedcertain Improvements in Valve-Operating Devices for Steam-Pumps, ofwhich the following is a specification.

lThe object of my invention is to so construct the Valve-operatingmechanism of a ro steampumpas to insure the smooth and easy movement ofthe valve and preventthe thumping and jarring due to the sudden startingof the piston at either end of the stroke. This object I attain in themanner which I will now proceed to describe, reference being had to theaccompanying drawings, in which- Figure lis a longitudinal section ofsuliicient of a steam-pump to illustrate my invention; Fig. 2, atransverse section of the same 2o on the line l 2; Fig. 3, a plan viewof the main and supplementary valve chests with the cover-plate of thesaid supplementary-valve chest removed; and Fig. 4, a transverse sectionon the line 3 4, Fig. 3.

A represents the steam-cylnder ofthe p ump, and B the piston, the rod Bof which is connected to the plunger Dof the pump in the usual manner,thecylindcr having the ordinary Steam-induction ports, x, communicating3o with its opposite ends, and-a central eduction or exhaust port,y, andhaving the usual D- valve, E, operating in conjunction with theseinduction and eduction ports in the ordinary manner, so as to direct thesteam to and per-l 3 5 mit it to escape from the ends of the cylinderalternately.

At each end of the central chamber, a, in which the valve E works, thevalve-chest F has two cylindrical bores, b and d, of differ- .aro entdiameters, and to these bores are adapted pistons f and g, secured to orforming part of sleeves which are connected to the main-valve stem G,the pistons f being adapted to the inner or smaller bores, b, and thepistons g to the larger or outerbores, d, of the valve-chest.

Above the main-valve chest F is a Supplementary-valve chest, H, in whichis a slidevalve, l, connected to a supplementary-valve rod, J, andOperating in conjunction with induction-ports a and eduction or 4exhaustport y', in the Same .gamer as the main valve E operates in conjunctionwith the main ports r and y. The induction-ports ar communicate with thespaces between the opposite pistons f andy of the main-valve stem, andone of said induction ports x communicates i through a passage, w,having aregulating-valve, w', with the front end of the valve-chestbeyond the front piston g, the other port x communicat- -ing through asimilarly-valved port, w, with the rear end of the valve-chest beyondthe rear piston y. The valve-rod G has adjustable collars m, for theaction of a slide, K, a projecting arm on which is adapted to act uponsimilar adjustable collars, n, of the supplementary-valve rod J, theslide being reciprocated by the piston-rod B through the medium of alever, M, hung to a bracket, N, carried by suitable rods, N', one arm ofsaid lever being Slotted for the reception of a pin, p, on thepiston-rod, and the other arm ofthe lever being connected by a rod, p',to the slide K.

The operation of the valve is asv follows: Supposing that the piston hasreached the limit of its rearward movement, as Shown in Fig. l, theslide K has been moved so as to strike the forward collars, mand n, 'ofthe valve-rods G and J, the effect of which is to move the main valve Eso as to close both of the inductionports a; x, and thus cut olf thesteam from both ends of the cylinder. At the same time the supplementaryvalve I has been moved so as to open the rear induction-port x to thesteam and the forward port x to the exhaust. The steam consequentlyenters the space between the rear pistons f and g, and, owing to thefact that the area ofthe piston g is greater than that of the piston f,the tendency of the steam in the iirst instance is to move the valve Erearward, or in a direction the reverse of its proper movement, suchrearward movement being prevented, however, by the contact of the collarm with the slide K. Steam finds its way to the outer face'of the pistong through the contracted opening presented by the regulating-valve w',and as soon as the pressure on the outer face of the piston is greaterthan the pressure of steam acting on the forward face of the same thepiston will be caused to move forward, the movement, however, being aSmooth and easy movement,

roo

and the first movementof the piston being correspondingly gradual, forit should be understood that it isimpossible for the pistonsf and f/ tomove at a greater speed than is warranted by the position of" thercgulatiilg-valve w', as the slightest accelerated movement reduces thepressure on the outside of the larger piston, while the pressure betweenthe pistons remains constant. This is a leading feature of my invention,as with the various other kinds of' steam-actuated valves with which ll'am familiar Vit requires a greater pressure to start than it does tokeep theln moving, the consequence being that when started the valvemoves rapidly, opens the imluetion-port to its full area, and starts thepiston on its returnstroke with a sudden jarring movement. W'h en thepiston reaches the forward limit of its movement, the operations abovedescribed are repeated in connection with the forward pistons f and gand the forward induction and regulating ports. ly adjusting the collarsm and n on the val ve-rods G and J, the stroke of the piston .l may bclimited to any desired extent.

In the drawings l have shown a passage, s, forming a communicationbetween the supplemcntary-valve chest H and the main-valve chest F, inorder to convey steam to said supplementary-wdve chest, another passage,s', forming a communication between the supplementary exhaust-port y andthe main exhaust-port y,- but it will be evident that any desired meansmay be adopted for conveyingY the steam to the supplementary-valve chestand for conveying the exhaust away from the same. Then it is not desiredto vary the speed of movement ofthe valve E, the valves lw/in the portsw maybe dispensed with, these ports being of such contracted arca asCompared with the area of the ports a" that the tlow of steam to theouter faces of the pistons f/ will be properly restricted; but the useof theregulati11g-valves is preferred in all cases.

I claim as my inventionl. The combination of' the main valve, oppositepairs of differential pistons connected to said valve, avalvechesthaving differential bores for said pistons, ports or passageswhereby a limited piston area is subjected to aconstrant pressuretending to move the valve in the wrong|` direction, and contractedpassages through the medium of which a large piston arca is subjected topressure tending to move the valve in the right direction, all substalrtially as specified.

2. The combination of' the main Valve, opposite pairs of differentialpistons connected to said valve, a valve-chest having differential boresfor said pistons, ports through which steam may be admitted to orexhausted from the spaces between said differential pistons, a

lsupplementary valve controlling said ports,

and contracted passages through which steam can gain access to the outerfaces ofthe larger pistons, all substantially as specified.

3. The combination of the main valve of a steam engine or pump, oppositepairs of dif'- ferential pistons connected to said valve, a valve-chesthaving differential bores for said pistons, ports through which steammay be admit-ted to or exhausted from the spaces bctween saiddifferential pistons, a supplementary valve controlling said ports,passages through which steam can pass to the outer faces' of the largerpistons, and adjustable valves whereby the area of said passages can becontrolled, all substantially as specified.

-f. The combination of the cylinder, its piston-rod, the main andsupjilementary valves and their actuating-rods, having adjustablecollars, the slide f'or acting on said collars, and a lever, one arm ofwhich is connected to said slide, the other arm being slotted forconnection tothe piston-rod or one of' its attachments, allsubstantially as specified.

ln testimony whereofl` have signed my naine to this specification in thepresence of two subscribing witnesses.

CIIAS. A. GOYNE.

\Vi tnesses:

Wn. fnnrow, liusnmns Marian.

